public class Student { private String name; private int age; } <student> <age>20</age> </student> xjc -d generated -p com.example.student student.xsd JAXBContext jaxbContext = JAXBContext.newInstance(Student.class); Unmarshaller unmarshaller = jaxbContext.createUnmarshaller(); Student student = (Student) unmarshaller.unmarshal(new File("student.xml")); Marshaller marshaller = jaxbContext.createMarshaller(); marshaller.marshal(student, new File("student.xml"));